Puncture mandrel and trocar with same

Abstract

The invention discloses a puncture core rod and a puncture device comprising the same. The puncture core rod comprises a tip end and at least two rod bodies, wherein the at least two rod bodies comprise a first rod body and a second rod body; the first rod body is provided with a first end and a second end; the second rod body is provided with a third end and a fourth end; the first end of the first rod body is connected with the tip end, and is integrally molded with the tip end; the second end of the first rod body is fixedly connected with the third end of the second rod body; a plurality of first connection structures are arranged at the second end; a plurality of second connection structures matched with the first connection structures are arranged at the third end; the third end of the second rod body is in fusion connection with the second end of the first rod body through an injection molding manner. Through the adoption of a sectional structure, during an injection molding production process of the puncture core rod, a sufficiently long location space can be reserved for a molding rod; the offset of the molding rod is avoided, so that the puncture core rod has high injection molding quality.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a puncture mandrel and a corresponding puncture device. Background technique [0002] In abdominal examination, abdominal surgery and other minimally invasive or surgical operations, trocar is an indispensable surgical instrument. The puncture device can establish an access channel in the abdominal wall of the human body, so that the laparoscope or other surgical instruments (such as endoscopes, scissors, staplers, guide wires, catheters, filters, stents, etc.) Channels to control the pneumoperitoneum required for surgery for examination or surgical manipulation. [0003] At the beginning of a minimally invasive laparoscopic medical operation, the doctor generally makes a small incision in the patient's abdomen, and then aligns the apex of the puncture end with the small incision and moves it downward while reciprocating left and right. After passing through the patie...

AI Technical Summary

Problems solved by technology

However, in the above production process, the forming rod is prone to offset, which affects the injection molding of the piercing core rod, making the wall thickness of the piercing core rod uneven

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